oSIST prEN 15698-1:2023

SLOVENSKI STANDARD
oSIST prEN 15698-1:2023
01-september-2023
Cevi za daljinsko ogrevanje - Poviti dvocevni sistemi za neposredno vkopana
vročevodna omrežja - 1. del: Tovarniško izdelan dvocevni sestav iz jeklene cevi,
poliuretanske toplotne izolacije in zunanjega polietilenskega plašča
District heating pipes - Bonded twin pipe systems for directly buried hot water networks -
Part 1: Factory made twin pipe assembly of steel service pipes, polyurethane thermal
insulation and one casing of polyethylene
Fernwärmerohre - Doppelrohr-Verbundsysteme für direkt erdverlegte Fernwärmenetze -
Teil 1: Werkmäßig gefertigtes Verbund-Doppelrohrsystem, bestehend aus Stahl-
Mediumrohren, einer Wärmedämmung aus Polyurethan und einer Ummantelung aus
Polyethylen
Tuyaux de chauffage urbain - Systèmes bloqués de bitubes pré-isolés pour les réseaux
d'eau chaude enterrés directement - Partie 1 : Assemblages de bitubes manufacturés
pour tube de service en acier, isolation thermique en polyuréthane et tube de protection
en polyéthylène
Ta slovenski standard je istoveten z: prEN 15698-1
ICS:
23.040.07 Cevovodi za daljinsko Pipeline and its parts for
ogrevanje in njihovi deli district heat
23.040.10 Železne in jeklene cevi Iron and steel pipes
91.140.10 Sistemi centralnega Central heating systems
ogrevanja
oSIST prEN 15698-1:2023 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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oSIST prEN 15698-1:2023

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oSIST prEN 15698-1:2023


DRAFT
EUROPEAN STANDARD
prEN 15698-1
NORME EUROPÉENNE

EUROPÄISCHE NORM

July 2023
ICS 23.040.07
English Version

District heating pipes - Bonded twin pipe systems for
directly buried hot water networks - Part 1: Factory made
twin pipe assembly of steel service pipes, polyurethane
thermal insulation and one casing of polyethylene
 Fernwärmerohre - Verbundmanteldoppelrohre für
direkt erdverlegte Fernwärmenetze - Teil 1:
Werkmäßig gefertigte Verbund-Doppelrohrsystem,
bestehend aus Stahl-Mediumrohr, Polyurethan-
Wärmedämmung und einem Mantel aus Polyethylen
This draft European Standard is submitted to CEN members for enquiry. It has been drawn up by the Technical Committee
CEN/TC 107.

If this draft becomes a European Standard, CEN members are bound to comply with the CEN/CENELEC Internal Regulations
which stipulate the conditions for giving this European Standard the status of a national standard without any alteration.

This draft European Standard was established by CEN in three official versions (English, French, German). A version in any other
language made by translation under the responsibility of a CEN member into its own language and notified to the CEN-CENELEC
Management Centre has the same status as the official versions.

CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia,
Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway,
Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Türkiye and
United Kingdom.

Recipients of this draft are invited to submit, with their comments, notification of any relevant patent rights of which they are
aware and to provide supporting documentation.

Warning : This document is not a European Standard. It is distributed for review and comments. It is subject to change without
notice and shall not be referred to as a European Standard.


EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION

EUROPÄISCHES KOMITEE FÜR NORMUNG

CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2023 CEN All rights of exploitation in any form and by any means reserved Ref. No. prEN 15698-1:2023 E
worldwide for CEN national Members.

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oSIST prEN 15698-1:2023
prEN 15698-1:2023 (E)
Contents Page
European foreword . 4
Introduction . 5
1 Scope . 6
2 Normative references . 6
3 Terms and definitions . 6
4 Requirements . 6
4.1 Steel service pipe . 6
4.1.1 Specification . 6
4.1.2 Diameter and wall thickness . 7
4.1.3 Surface condition . 7
4.2 Casing . 7
4.3 Polyurethane foam thermal insulation . 7
4.4 Twin pipe assembly . 7
4.4.1 General . 7
4.4.2 Thermal insulation series . 7
4.4.3 End alignment of flow and return steel service pipes . 8
4.4.4 Distance between flow and return steel service pipes . 8
4.4.5 Twisting of steel service pipes . 9
4.4.6 Centre line deviation .10
4.4.7 Ends of twin pipe assembly .10
4.4.8 Expected thermal life and long term temperature resistance .11
4.4.9 Axial shear strength .11
4.4.10 Thermal conductivity in unaged condition .11
4.4.11 Thermal transmittance .11
4.4.12 Impact resistance .11
4.4.13 Surface conditions at delivery .11
4.4.14 Linear water tightness .11
4.4.15 Measuring wires for surveillance systems .11
5 Test methods .11
5.1 General .11
5.2 Test specimens .12
5.3 Polyurethane foam thermal insulation .12
5.4 Twin pipe assembly .12
5.4.1 Axial shear strength .12
5.4.2 Expected thermal life and long term temperature resistance .14
5.4.3 Thermal conductivity in unaged condition .14
5.4.4 Thermal conductivity at artificially aged condition .14
5.4.5 Impact resistance .14
5.4.6 Linear water tightness .14
6 Marking .14
Annex A (informative) Guidelines for inspection and testing .15
A.1 General .15
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prEN 15698-1:2023 (E)
A.2 Manufacturer’s type test . 15
A.3 Manufacturer’s quality control . 15
A.4 Additional inspection . 15
A.5 Manufacturer’s responsibility . 15
Annex B (informative) Waste treatment and recycling . 17
Bibliography . 18

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oSIST prEN 15698-1:2023
prEN 15698-1:2023 (E)
European foreword
This document (prEN 15698-1:2023) has been prepared by Technical Committee CEN/TC 107
“Prefabricated district heating and district cooling pipe system”, the secretariat of which is held by DS.
This document is currently submitted to the CEN Enquiry.
This document will supersede EN 15698-1:2019.
The main changes compared to the previous edition are listed below:
— alignment with the structure of EN 253;
— mistake correction in Table 3;
— In alignment with the other standards of CEN/TC 107, explanatory information has been included in
Annex A.
The EN 15698 series, under the title District heating pipes - Bonded twin pipe systems for directly buried
hot water networks, is currently composed of the following parts:
— Part 1: Factory made twin pipe assembly of steel service pipes, polyurethane thermal insulation and one
casing of polyethylene;
— Part 2: Factory made fitting and valve assemblies of steel service pipes, polyurethane thermal insulation
and one casing of polyethylene.
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oSIST prEN 15698-1:2023
prEN 15698-1:2023 (E)
Introduction
This document has been elaborated as a complement to the standards for bonded pipe systems for buried
hot water networks using steel service pipe and polyurethane foam thermal insulation and outer casing
of polyethylene.
These standards are:
— EN 253, District heating pipes — Bonded single pipe systems for directly buried hot water networks —
Factory made pipe assembly of steel service pipe, polyurethane thermal insulation and a casing of
polyethylene
— prEN 448, District heating pipes — Bonded single pipe systems for directly buried hot water networks
— Factory made fitting assemblies of steel service pipes, polyurethane thermal insulation and a casing
of polyethylene
— prEN 488-1, District heating pipes — Bonded single pipe systems for directly buried hot water networks
— Part 1: Factory made steel valve assembly for steel service pipes, polyurethane thermal insulation
and a casing of polyethylene;
— prEN 488-2, District heating and district cooling pipes — Bonded pipe systems for directly buried hot
and cold water networks — Part 2: Factory made steel valve assembly for draining and venting,
polyurethane thermal insulation and a casing of polyethylene
— EN 489-1, District heating pipes — Bonded single and twin pipe systems for buried hot water networks
— Part 1: Joint casing assemblies and thermal insulation for hot water networks in accordance with
EN 13941-1
— EN 13941-1, District heating pipes — Design and installation of thermal insulated bonded single and
twin pipe systems for directly buried hot water networks — Part 1: Design
— EN 13941-2, District heating pipes — Design and installation of thermal insulated bonded single and
twin pipe systems for directly buried hot water networks — Part 2: Installation
— EN 14419, District heating pipes — Bonded single and twin pipe systems for buried hot water networks
— Surveillance systems
— EN 15632 (all parts), District heating pipes — Factory made flexible pipe systems
— prEN 15698-2, District heating pipes — Bonded twin pipe systems for directly buried hot water
networks — Part 2: Factory made fitting and valve assemblies of steel service pipes, polyurethane
thermal insulation and one casing of polyethylene
— EN 17248, District heating and district cooling pipe systems — Terms and definitions
— EN 17414 (all parts), District cooling pipes — Factory made flexible pipe systems
— EN 17415 (all parts), District cooling pipes — Bonded single pipe systems for directly buried cold water
networks
— EN 17878 (all parts), District heating pipes — Factory made flexible pipe systems with a lower
temperature profile
Waste management and recycling of materials is dealt with in Annex B.
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oSIST prEN 15698-1:2023
prEN 15698-1:2023 (E)
1 Scope
This document specifies requirements and test methods for straight lengths of factory made thermally
insulated bonded twin pipe assemblies for directly buried hot water networks in accordance with
EN 13941-1, comprising two steel service pipes, polyurethane (PUR) foam thermal insulation and a
casing of polyethylene.
The twin pipe assembly can also include the following additional elements: Measuring wires, spacers and
diffusion barriers.
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content
constitutes requirements of this document. For dated references, only the edition cited applies. For
undated references, the latest edition of the referenced document (including any amendments) applies.
EN 253, District heating pipes - Bonded
...